Given is the liquidus surface projection of the system A-B-C. The heavy lines are phase boundaries and the light ones are igotherms. 1) Labe1 the primary crystallization areas. 2) Show directions of falling temperature along all boundaries. 3) Identify binary and ternary invariant points. Fstimate the unknown temperatures of the invariant points. 4) What are the liquidus and solidus temperatures for the alloys X,Y, 7, T,W, and U. 5) Draw isothermal sections at 1400 and 1340C. 5) Nraw an approximate phase diagrar for the A-C binary. 7) Draw vertical sections through BAC and through B7. 8) Draw a cooling curve for the alloy designated as U. 9) At what temperature the first liquid will appear in alloy T ? How much liquid is formed at this temperature and what is its composition? 10) When alloy T reaches 1330C, which phases are present and what are their relative proportions